Pasteurizer and cooler.



C. 0. ROBINSON, DECD.

E. s. ROBINSON. ADMINISTRATRIX.

PASTEURIZER AND COOLER.

APPLICATION F|LED NOV. 22. 1913.

Patented Dec. 7, 1915..

glwuawtoc A T r'r crib.

CHARLES O. ROBINSON, OF FREDERICK, MARYLAND; EFFIE S. ROBINSON ADMINIS- TRA'IRIX OF SAID CHARLES O. ROBINSON, DECEASED.

PASTEURIZER AND COOLER. I 1 ]U52 8@@ Specification of Letters Patent. Patented D "3, 1915 Application filed November 22, 1913. Serial No. 802,467.

To allwkom it may concern: that aspace 7 will be left between the side Be it known that I, CHARLES O.-Ron1NsoN, walls of the inner and outer containers, eX- a citizen of the United States, residing at tending all around between the same, and a Frederick, in the county of Frederick and similar space 8 beneath the bottom of the State of Maryland, have invented certain inner container. This bottom 9 of the inner 60 new and useful Improvements in Pasteurcontainer is reticulated or perforated, but izers and Coolers, of which the following is the side walls are solid, so that circulation a specification, reference being had therein can only take place through the bottom. In to the accompanying drawing. order to maintain uniformity of spacing be 10 My invention relates to the art of pastween the inner and outer containers I pro 65 teurizing, and has for its object the producvide distance pieces or projections, marked tion of apparatus for perfectly pasteurizing l0 and feet 11 preferably on the inner consubstances in their containing vessels, such tainer. as milk in the bottles, and Cooling the same Fitted within the container is a rack com- 15 immediately afterward without damaging posed of four upright angle pieces 12, car- 70 the vessels orchanging the condition of the rying between them rectangular reticulated contents. v or perforated platforms or shelves 13. The

I attain my object by providing an inner rack is readily slid into and out of the inner and an outer container, with an intermural container, and may be provided with any space between them, the inner container havsuitable or desired form of handles for this 75 ing a perforated or recticulated bottom, and purpose, or it may be lifted by means of being supported above the bottom of the hooks inserted through the upper platform outer container. The milk bottles or other or through openings in the upper ends of the vessels are placed in the inner container, angle pieces.

and a cool liquid such as water introduced ()verlying and covering both containers is 80 into the upper portion of the inter-mural a hollow cover 14, having side walls 16, a

space, so that it will flow down around the top 15 and a. bottom 17 with a seriesof perinner container and then up through the forat-ions 18 extending all around the edges bottom thereof. A source of heat is applied of the bottom 17 and when the cover is in 39 below said bottom. and means provided for position, opening communication between 85 draining off the liquid from the top of the the chamber within said cover and the space inner container. I pro 'ide also a cover for 7 between the side walls of the inner .and the apparatus which extends over both oonouter containers. The top of the ,cover is tainers and the inter-mural space. provided with a central opening 19 fitted The method of pasteurizing which is diswith a plug 20 for the introduction of cool- 90 closed herein is claimed in a copending diviing water. sional application filed February 27, 1914, The inner container is provided with a Serial N 0. 821,502. The claims in the pres short drainage pipe or nipple 21 near the top ent application will be directed particularly of one of its side walls, and directly 0 po- 40 to apparatus for practising the method. site this, so as to register therewith hen 95 Iy invention is illustrated in the accomthe parts are in position, is the opening 5 in panying drawing. which shows the same in the side wall of the outer container. A suitperspective, with parts broken away to show able overflow pipe 22 is connected to the the interior construction thereof. nipple 21 through the opening 5 during op- In the drawing 1 designates the outer coneration. 1 tainer, which in this case is a rectangular In practising my method of pasteurizing vessel of' copper tinned inside, having a with the apparatus thus described, the folflanged upper edge 2 and adrain pipe 3 lowing steps are performed: Firstthe rack leading from the bottom and fitted with a 12-l3 is removed and filled with bottles,

suitable cock 4. An opening 5 is provided some. of which may also be placed upon the 4105 in the upper part of one side wall to receiye perforated bottom of the inner container if an overflow pipe which will be presently dedesired. I prefer, however, to support the scribed. Inside the outer container 1 is an bottles upon the rack alone, sothat they can inner container 6 of similar shape, but havall be removed after sterilization by simply ing its dimensions less in all directions, so taking out the rack, which can then be re- 116 temperature of the water.

burners positioned beneath flows into the top, surfaces of the bottom loaded and immediately replaced, or may be duplicate rack sterilizer in constant operation Without any loss of time. Theloaded rack having been dropped into the inner container, the cover 14L is placed in position with its flanged edge fitting around. the edge of the outer containei and resting upon the upper flange 2 thereof, and its bottom 17, which is slightly domed or coned or. otherwise raised, overlying the inner container. The containers are then filled with cool water which maybe by means of the pipe or any other suitable means of supply before or after the cover is put on. Heat is then applied to raise the .The simplest of a flame or the bottom of the outer container. It should be understood' that suitable heating means may be employed, whether coal, steam, all of which are way to do this is by means well known in the art and need no description. The application of heat continues until the temperature of all. the contents of the outer container,

is raised to 140, which may be determined. by a gage or thermometer, also not shown. This temperature is maintained for the required period of 20 to 30 minutes,

and then the supply of heat is cut off, and cold water is introduced into the top 14 through the opening 19, from which the plug 20 is removed for that purpose.

down over the inclined 17, and through the openings 18 into the chamber or space 7 between the inner and outer containers. As the level of the water in this space is thus raised above thelevel of the drainage pipe or nipple 21, the top layer of hot ,water in the inner container flows,.outthrough the nipple 21 and the overflow pipe 22. At the same time, the cold waterhas a tendency to sink down and by convection gradually cool the heated water in the chamber or space 7 and also to absorb a'certain amount of the heat from the inner container by conduction through the solid side walls thereof. Thus, there is a-gradual abstraction of heat, and drainage of hot water from the top, until the cooled water has fallen below the bottom of the inner container when itwill com mence to rise through the perforated bottom 9, and gradually, both as regards its temperature and as regardsits-fiow, to replace the hot water constantly raising the latter and causing it to drain off through the nipple 21 and pipe '22. At the end of a few minutes the process is complete, because the temperaturecf the bottles and their contents falls gradually with thetemperature of the water surrounding them,

gas, electric or This cold water eral dimensions less than After the desired minimum temperature is reached, the inflow of cold water is stopped, the cover 14: is removed and the rack 12-43 slid out and replaced with-a freshcharge of bottles. a

It is to be understood, that changes may be made in many details of this apparatus, and even in some of the structural features, without departing from the spirit vention, and all such changes are contemplated by me as included within the scope of the following claims. For example, I may use the opening in the top of the cover,

or any other suitable means for'introducing hot as well as cold water in thespace between the inner and outercontainers. In other words, 'I may first fill the machine with cold-water, and then cause hot water of the into pass down through the space 7 and-up through the bottom 9 of the inner container and out through the pipe 22, thereby gradually heating the bottles, as the cold water drains oil from the top. I may also introduce hot water, through the pipe 22, and cause it to pass down through theinner container, and then drain off, or I may otherwise varythe use of this apparatus.

The principal and essential feature of the invention isthe gradual raising of temperature by convection or conduction or both, and the gradual reduction of the saine by circulation, convection, and conduction in the general manner described.

Having thus described my invention what I claim is:

1. In a pasteurizing apparatus, an outer container adapted to hold fluid, an inner an interior removable rack containing openings to permit the free circulation of pasteurizing fluid, and said cover extending over-the intermural space between the contai'iiers and containing a chamber communicating through openings with said intermural space and adapted to receive fluid and conduct the same into said intermural space, whereby when the apparatusis closed and in operation, a continuous circulation of liquid may be produced through the hollow cover into the intermural space, down heneath the inner container, up through the reticulated bottom and the perforated rack around the articles to be pasteurized, and finally out of the drainage pipe in the upper part of the inner container.

2. A pasteurizing apparatus comprising an outer container 1, having solid sides and bottom, an'inner container 6 having its sevthe corresponding dimensions of the outer container and held said inner container,

' container therein so as to leave a spaembetween the side walls and the bottoms of the two containers, said inner container having its upper part solid and its lower part perforated or reticulated, a perforated or reticulated rack within said inner container, drainage means extending from the upper part of and a cover having a top, bottom andside walls inclosing a chamber, said cover being provided with an opening for the introduction of fluid, and saidbottom extending over both containers and having a series of. peripheral openings communicating with the intermural space between the containers when the cover is in place.

3. In a pasteurizing apparatus, an outer adapted to hold fluid, an inner container therein, a cover for both containers, and means for draining off heated fluid, said inner container having solid side walls and a perforated or reticulated bottom, and an interior removable rack containing openings to permit the free circulation of pasteurizing fluid, and said cover extending over the intermural space between the containers together with means carried by said cover communicating'through openings with said intermural space and adapted to receive liuid and conduct the same into said intermural space, whereby when the apparatus is closed and in operation, a continuous circulation of liquid may be produced through said means into the intermural space, down beneath the inner container, up through the reticulated bottom and the perforated rack around the articles to be pasteurized, and finally out of the drainage pipe in the upper part of the inner container.

4-. In a pasteurizing apparatus, an outer container adapted to hold fluid,-an inner container therein, a cover for both containers, and means for draining off heated fluid, said inner container having solid side Walls and t perforated or reticulated bottom, and an interior removable rack containing openings to permit the free circulation of pas- @upies termural space,

teurizing fluid, and said cover extending over the intermural space between the containers together with means communicating With the upper part of said intermural space through openings distributed over the entire area of said space, said means adapted to receive fluid and conduct the same into said intermural space, ratus is closed and in operation, a continuous circulation of liquid may be produced through said means into the irltermural space, down beneath the inner container, up through the reticulated bottom and the perforated rack around the articles to be pasteurized, and finally out of the drainage pipe in the upper part of the inner container.

In a pasteurizing apparatus, an outer container adapted. to hold fluid, an inner container therein, a coverfor both containers, and means for draining off heated fluid, said inner container having solid side walls and a perforated or reticulated bottom, and

an interior removable rack containing openlngs to permit the free circulation of pasteurizing fluid, and said cover extending over the intermural space between the containers, together with means extending over said intermural space and adapted to receive fluid and distribute the same with approximate uniformity over and into the said in- Whereby when the apparatus is closed and in operation, a continuous and uniform circulation of liquid of varying temperature may be produced through said means into the intermural space, down heneath the inner container, up through the reticulated bottom and the perforated rack around the articles to be pasteurized, and finally out of the drainage pipe in the upper part of the'inner container.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES o. Ronrnsou.

Witnesses:

CLAUDE S. HAHN, ALBERT S. BRoWN.

of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G.

whereby when the appa 

